update_address · CiviCRM MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_address does on CiviCRM MCP Server

AI agents use update_address to create or update resources in CiviCRM MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your CiviCRM MCP Server environment.

WHY IT NEEDS A POLICY

Why update_address needs a policy

This tool modifies existing address data without deleting it, which is a Write operation. It is reversible (the address can be updated again to restore previous values), so it is not Destructive. Severity is medium because incorrect address updates could affect contact management and communication routing, but the blast radius is limited to a single address record and the operation is recoverable.

From the tool's definition Tool name 'update_address' and description 'Update an existing address record' clearly indicate modification of existing data in a reversible manner.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_address Rate-limited

update_address stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "update_address": {
      "limits": [
        {
          "counter": "update_address_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches CiviCRM MCP Server, so you can run agents against it safely.

FAQ

Questions about update_address

What does the update_address tool do? +

Update an existing address record. It is categorised as a Write tool in the CiviCRM MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_address? +

Register the CiviCRM MCP Server MCP server in PolicyLayer and add a rule for update_address: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches CiviCRM MCP Server. Nothing to install.

What risk level is update_address? +

update_address is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit update_address? +

Yes. Add a rate_limit block to the update_address rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block update_address completely? +

Set action: deny in the PolicyLayer policy for update_address. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides update_address? +

update_address is provided by the CiviCRM MCP Server MCP server (johncallhub/civicrm-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.